The Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) received more than 310,000 comments from the public on the agency’s failed attempt to ban a popular form of ammunition used in AR-15 rifles.

In a notice posted on its website Tuesday the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) announced it will no longer pursue a ban on a popular form of 5.56 ammunition commonly used in AR-15 rifles.

A group of men denied concealed carry permits in Washington, D.C., under the city’s new permitting process, which was adopted after Judge Frederick Scullin Jr. ruled in Palmer v. District of Columbia that its outright ban on gun carry was unconstitutional, have filed suit against the district.